Exterior lantern



FIG. 1 is a front perspective view of an exterior lantern showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image;

FIB. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a rear elevational view thereof.

The broken line showing of the light bulb sockets in FIG. 1 are for purposes of illustration only and form no pat of the claimed design. 

The ornamental design for an exterior lantern, as shown and described. 